/**
 *  Copyright 2009-2010 Steven Ottenhoff (Dual-IT)
 * 
 *  This file is part of Clazzified.
 *
 *  Clazzified is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  Clazzified is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Clazzified.  If not, see http://www.gnu.org/licenses/gpl.
 * 
 */

package nl.dualit.clazzified.core.model.relation;

import java.util.Map;

import nl.dualit.clazzified.core.model.AbstractBuilder;
import nl.dualit.clazzified.core.model.clazz.Clazz;

public class RelationBuilder extends AbstractBuilder {
	
	
	private RelationBuilder(){
		throw new IllegalArgumentException("Empty constructor not allowed");
	}
	
	
	/**
	 * Return a new relation instance based on the typeName. Returns null if a
	 * typeName is unknown/
	 * 
	 * @param name Name of the relation
	 * @param description Description of the relation
	 * @param typeName Name of the type of relation
	 * 
	 * @return An instance of IRelation
	 */
	public static IRelation getInstance( Clazz clazz, String name, String description, RelationTypes type ){

		switch( type ){
		
		case COMPOSITE:
			return new CompositeRelation( clazz, name, description);
		}
		return null;
	}

	public static IRelation getInstance( Clazz clazz, Map<String,String>  data ){
		String typeName =  data.get( "typeName" );
		String description = ( data.get("description") == null ) ? "" : data.get("description");
		if( typeName.equals( "COMPOSITE" ) )
			return new CompositeRelation( clazz, 
				Long.valueOf( data.get("id") ), 
				data.get("name"),
				description );
		
		return null;
	}
}
